Rotary structure for a simple membrane strapping apparatus

ABSTRACT

The rotary structure of a simple membrane strapping apparatus includes a reel pivot having one end opposite to a movable handle extending outward for a preset distance and forming a stopping annular surface to be pressed by a user&#39;s hand that holds the movable handle so as to stop the reel pivot from rotating and the membrane wound on a membrane reel from released. Thus, the membrane released can be pulled tight and pasted closely on the peripheral sides and the corner portions of an article, having an excellent effect of membrane strapping.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a rotary structure for a membrane strappingapparatus, particularly to one provided with a reel pivot having one endopposite to a movable handle formed with a stopping annular surfaceextending downward for a preset distance to be pressed to stop amembrane reel from releasing the membrane wound thereon so that themembrane released can be pulled tight and pasted closely on the surfacesof an article, convenient in handling.

2. Description of the Prior Art

Generally, a membrane strapping apparatus is provided with a membranereel having a membrane wound thereon to be released and strapped onarticles so as to prevent them from swaying or falling when they arestored or transported. Nowadays, a conventional simple membranestrapping apparatus is widely employed for the convenience of carryingout membrane releasing and strapping. The conventional simple membranestrapping apparatus is provided with an immovable handle having itsupper end formed integral with a reel pivot. In using, a membrane reelhas one end fitted and positioned on the reel pivot of the membranestrapping apparatus and then hold the handle to carry out membranereleasing and strapping. However, in a membrane releasing and strappingprocess, a user's hand has to be turned together with the handle,inconvenient in use and likely to cause hurt to a user's hand.

In view of the above-mentioned drawback, the conventional membranestrapping apparatus is provided with a movable handle to rotate relativeto the reel pivot for facilitating membrane releasing. In reality, whenthe membrane reel rotates to carry out membrane releasing and strapping,the reel pivot sometimes has to be kept motionless so as to enable thereleased membrane portion to be pulled tight and pasted closely on thesurfaces of an article especially when the released membrane is bypassedthe corner portions of the article. However, the conventional simplemembrane strapping apparatus with a movable handle is provided with nostopping device to be pressed for stopping the reel pivot from rotatingby a user's hand that holds the handle. Therefore, when the user appliesa force to pull tight the released membrane portion, it is impossible tokeep the reel pivot motionless, unable to strap an article tightly.

SUMMARY OF THE INVENTION

The objective of the invention is to offer a rotary structure for asimple membrane strapping apparatus, provided with a reel pivot havingone end opposite to a movable handle formed with a stopping annularsurface extending downward for a preset distance to be pressed forstopping the reel pivot from rotating by a user's hand that holds themovable handle.

The stopping annular surface provided in the rotary structure of thepresent invention is convenient for a user to press and stop the reelpivot from rotating and synchronously stop the membrane wound on amembrane reel from released. Thus, the membrane portion released can bepulled tight and pasted closely on the peripheral sides and the cornerportions of an article, greatly heightening quality and efficiency ofmembrane strapping operation.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to theaccompanying drawings, wherein:

FIG. 1 is a perspective view of a first preferred embodiment of amembrane strapping apparatus in the present invention:

FIG. 2 is an exploded perspective view of the first preferred embodimentof the membrane strapping apparatus in the present invention:

FIG. 3 is a side view of the first preferred embodiment of the membranestrapping apparatus in the present invention:

FIG. 4 is a side view of the first preferred embodiment of the membranestrapping apparatus in a using condition in the present invention:

FIG. 5 is a perspective view of a second preferred embodiment of amembrane strapping apparatus in the present invention: and

FIG. 6 is a side view of the second preferred embodiment of the membranestrapping apparatus in a using condition in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A first preferred embodiment of a rotary structure for a simple membranestrapping apparatus 10 in the present invention, as shown in FIGS. 1, 2and 3, includes a reel pivot 20, a handle-fitting rod 30, a movablehandle 40 and a membrane reel 50. The reel pivot 20 is column-shapedwith a comparatively large diameter for fitting and positioning themembrane reel 50 thereon, having one end axially extending downward andforming the handle fitting rod 30 with a comparatively small diameter.The movable handle 40 is pivotally fitted on the handle fitting rod 30,able to rotate relative to the reel pivot 20 and the membrane reel 50 soas to let the membrane reel 50 release the membrane 51 wound thereon forcarrying out membrane strapping.

Further, the reel pivot 20 has its lower side formed with a bottom rim21 having a portion near its center axially extending downward for apreset distance and forming an annular wall 22, which has its outercircumferential side provided axially with a plurality of stopping ribs231 surrounding all sides. The stopping ribs 231 have their upper endsextending to reach a region near the center of the bottom rim 21 of thereel pivot 20 and forming a stopping annular surface 23 to be pressedstopping the reel pivot 20 from rotating by a user's hand that holds themovable handle 40.

In assembling and using, as shown in FIG. 4, firstly, the membrane reel50 has a shaft hole 52 in one end fitted with the reel pivot 20 of amembrane strapping apparatus 10 to position the membrane reel 50thereon. Next, a user holds the movable handle 40 of the membranestrapping apparatus 10 with one hand and pull outward the membrane 51 onthe membrane reel 50 for a short distance with the other hand and pasteit on one peripheral side of an article and have it bypassing a nearbycorner portion of the article and fix it thereon. Subsequently, themembrane strapping apparatus 10 is held and moved along the peripheralsides of the article (a large-sized one able to be placed at a certainposition) and synchronously the reel pivot 20 of the membrane strappingapparatus 10 will automatically rotate and actuate the membrane reel 50to rotate and release the membrane 51. To ensure the membrane 51 pulledoutward to be closely strapped on the surfaces of an article, simplypress the strapping ribs 231 on the stopping annular surface 23 underthe reel pivot 20 to stop the reel pivot 20 from rotating with the thumbof one hand that holds the movable handle 40 before the membrane 51 isbypassed the boundary of each corner portion of the article. At thistime, when the membrane strapping apparatus 10 is held to move forwardagain, the previously released membrane 51 can be pulled tight andpasted closely on the peripheral surfaces and another corner portion ofthe article.

A second preferred embodiment of a rotary structure for a membranestrapping apparatus 10 in the present invention, as shown in FIGS. 5 and6, is almost the same as that described in the first preferredembodiment, except that the membrane strapping apparatus is providedwith a column-shaped reel pivot 20′ with a comparatively small diameter,and the reel pivot 20′ has its circumferential surface provided withfour strip-shaped positioning ribs 24 and its lower side formed with anannular member 25 with a diameter larger than that of a handle fittingrod 30. The annular member 25 has its bottom rim 21 provided thereonwith a plurality of stopping ribs 231 extending upward. Thus, themembrane reel 50 can easily be fitted on the reel pivot 20′, which canbe controlled to stop rotating as described in the first preferredembodiment.

Evidently, this invention has the following advantages.

L. In a membrane releasing and strapping process, the stopping annularsurface 23 formed at the lower end of the reel pivot 20, 20′ can betimely pressed by a user's hand that holds the movable handle 40 to stopthe membrane 51 from released so as to enable the released membrane 51to be pulled tight and pasted closely on the surfaces of an article,achieving an excellent effect of membrane strapping operation.

2. To stop the reel pivot 20 from rotating and the membrane 51 fromkeeping released, it is enough only to press the stopping annularsurface 23 with the thumb of a user's hand that holds the movable handle40, easy and quick in handling.

3. The stopping annular surface 23 is simple in structure, easy to beproduced and very profitable.

While the preferred embodiments of the invention have been describedabove, it will be recognized and understood that various modificationsmay be made therein and the appended claims are intended to cover allsuch modifications that may fall within the spirit and scope of theinvention.

1. A rotary structure for a simple membrane strapping apparatuscomprising a reel pivot for fitting a membrane reel thereon, said reelpivot having one end extending downward axially and forming a handlefitting rod, a movable handle pivotally fitted on said handle fittingrod, said membrane reel able to rotate relative to said reel pivot andsaid movable handle, said membrane reel rotated to release the membranewound thereon for carrying out strapping work: and, Characterized by astopping annular surface extending outward for a preset distance fromone end of said reel pivot opposite to said movable handle, saidstopping annular surface able to be timely pressed by a user's hand thatholds said movable handle, said stopping annular surface pressed to stopsaid membrane on said membrane reel from released, membrane releasedable to be pulled tight and pasted closely on the surfaces of anarticle, said membrane strapping apparatus obtaining excellent qualityand efficiency of membrane strapping operation.
 2. The rotary structurefor a simple membrane strapping apparatus as claimed in claim 1, whereinsaid stopping annular surface is formed thereon with a plurality ofaxial stopping ribs surrounding all sides.
 3. The rotary structure for asimple membrane strapping apparatus as claimed in claim 1, wherein saidreel pivot is column-shaped shaft with a comparatively large diameterand has its lower end formed with a bottom rim with a diameter largerthan that of said handle fitting rod, said stopping annular surfaceextending upward to reach a region near the center of said bottom rim.4. The rotary structure for a simple membrane strapping apparatus asclaimed in claim 1, wherein said reel pivot is a column-shaped shaftwith a comparatively small diameter, and has its circumferential surfaceformed with a plurality of strip-shaped ribs for fitting and positioninga membrane reel and its lower end formed with an annular member with acomparatively large diameter, said annular member having its lower sideformed with a bottom rim with a diameter larger than that of said handlefitting rod, said stopping annular surface extending upward to reach aregion near the center of said bottom rim.